dc.creator | Godfrey, Stephen J. | |
dc.creator | Gutstein, Carolina Simon | |
dc.creator | Morgan III, Donald J. | |
dc.date.accessioned | 2022-06-28T20:06:26Z | |
dc.date.accessioned | 2022-10-17T15:32:45Z | |
dc.date.available | 2022-06-28T20:06:26Z | |
dc.date.available | 2022-10-17T15:32:45Z | |
dc.date.created | 2022-06-28T20:06:26Z | |
dc.date.issued | 2021 | |
dc.identifier | Foss. Rec., 24, 275–285, 2021 | |
dc.identifier | 10.5194/fr-24-275-2021 | |
dc.identifier | https://repositorio.uchile.cl/handle/2250/186292 | |
dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/4420120 | |
dc.description.abstract | A new monotypic genus of Neogene odontocete
(Isoninia borealis) is named on the basis of a partial skull
(CMM-V-4061). The holotype was found on the riverbed
of the Meherrin River (North Carolina, USA) and probably
originated from the Miocene marine Eastover Formation.
Deep interdigitation of the cranial sutures indicates that
this individual was mature. The new taxon differs from all
other delphinidans in the unique combination of the following
characters: anteriorly retracted premaxillae and maxillae;
premaxillae not contacting nasals; thick nasals with
ventrolateral margins deeply imbedded within corresponding
troughs in the frontals (this is an apomorphy); nasals
with transversely convex dorsal surface; nearly symmetrical
vertex; os suturarum (or interparietal or extra folds of
the frontals) at the vertex; large dorsal infraorbital foramen
level with the posterior margin of the external bony
nares; and a postorbital recess on the ventrolateral face of
the frontal below and behind the postorbital process of the
frontal. This odontocete exhibits two small but pronounced
concavities on the cerebral face of the frontal/presphenoid
that are presumed to have held vestigial olfactory bulbs
in life. Inioidea is only diagnosed by a single unequivocal
synapomorphy: width across nasals and nares subequal.
Isoninia shares this feature with other inioids and forms
the basis for the placement of Isoninia within this clade.
A relatively high vertex coupled with a supraoccipital that is deeply wedged between the frontals suggests placement
of this new inioid species within the family Iniidae. This is the second inioid described from the Eastover Formation
(the other being Meherrinia isoni). This new species
adds new cranial morphology and a new combination of
cranial characters to this taxonomically small but growing
group of mostly marine and mostly Western Hemisphere
odontocetes (urn:lsid:zoobank.org:pub:E8B817CAB250-
42B3-9365-36EFBFE351C9). | |
dc.language | en | |
dc.publisher | Copernicus Gesellschaft MBH, Germany | |
dc.publisher | c | |
dc.rights | http://creativecommons.org/licenses/by-nc-nd/3.0/us/ | |
dc.rights | Attribution-NonCommercial-NoDerivs 3.0 United States | |
dc.source | Fossil Record | |
dc.subject | Late miocene | |
dc.subject | Dolphin cetacea | |
dc.subject | River | |
dc.subject | Pliocene | |
dc.subject | Pontoporiidae | |
dc.subject | Brachydelphis | |
dc.subject | Lineages | |
dc.subject | History | |
dc.subject | Record | |
dc.subject | Genus | |
dc.title | A new odontocete (Inioidea, Odontoceti) from the late Neogene of North Carolina, USA | |
dc.type | Artículos de revistas | |